Programming a Digital Average Power Measurement

General Programming Procedure

1. Prompt the user to connect the access terminal to the test set's front panel RF IN/OUT connector and power it on. Instruct the user that if the access terminal does not automatically open a session, perform whatever actions are necessary to open a session. See Establish a Session from the Access Terminal for more details.
2. Prompt the user to establish an RTAP data connection. See Step 4: Make a connection for more details.
3. Set up the access parameters as needed using the CALL:APARameter commands.
4. Set up the digital average power measurement parameters as needed using the SETup:DAPower commands.
5. Set cell power as needed using the CALL:POWer command.
6. Set the Reverse Closed Loop Power Control mode as needed using the CALL[:CELL[1]]:CLPControl:REVerse:MODE<[:SELected]|:TA856> command.
7. Initiate the digital average power measurement using the INITiate:<measurement mnemonic>[:ON] command. The <measurement mnemonic> for the digital average power measurement is DAPower.
8. Use the FETCh:DAPower commands to obtain the measurement results. (You can also replace steps 7 and 8 with a single command - READ:DAPower[:ALL]? ).

Programming Example: 4.3.4 Maximum RF Output Power

 
10 ! 4.3.4 Maximum RF Output Power
20 ! This programming example assumes the access terminal
30 ! is connected to the test set and in a 153.6 kbps
40 ! RTAP data connection.
50 !
60       Testset=714
70 !
80       DISP "Measuring Maximum Power"
90 !
100 !***Set up test parameters***
110 !
120       Ior=-60
130       ! Set cell power for test
140       Ol_adjust=84
150       ! Set Open Loop Adjust for Band Class 4
160 !
170       OUTPUT Testset;"CALL:APAR:POWER:OLADJUST ";Ol_adjust
180       ! Set Open Loop Adjust
190       OUTPUT Testset;"CALL:APAR:PROBE:IADJUST 15"
200       ! Set Probe Initial Adjust
210       OUTPUT Testset;"CALL:APAR:PROBE:STEP:COUNT 15"
220       ! Set Probe Num Steps
230       !OUTPUT Testset;"CALL:APAR:PROBE:SEQUENCE 15"
240       ! Set Probe Sequence Max - this parameter setting is required
250       ! by C.S0033 but does not affect test results. It is a legacy
260       ! parameter setting from IS-98. Changing this parameter drops
270       ! the connection, as required by C.S0024. It is recommended not
280       ! to send this command.
290       OUTPUT Testset;"CALL:APAR:PROBE:POWER:STEP 7.5"
300       ! Set Probe Step
310 !
320 !***Set up measurement parameters***
330 !
340       OUTPUT Testset;"SETUP:DAPOWER:CONTINUOUS OFF"
350       ! Set measurement to single trigger
360       OUTPUT Testset;"SETUP:DAPOWER:TIMEOUT 1"
370       ! Set DIGITAL Power timeout to 1 sec
380 !
390 !***Set test conditions***
400 !
410       OUTPUT Testset;"CALL:POW ";Ior
420       ! Set Cell Power for Test
430       OUTPUT Testset;"CALL:CLPCONTROL:REVERSE:MODE UP"
440       ! Start transmission of All Up (0) power control bits
450       WAIT 1
460       ! Settling time to allow mobile power to slew up to maximum power
470 !
480 !***Obtain measurement results***
490 !
500       OUTPUT Testset;"INITIATE:DAPOWER"
510       ! Initiate digital average power measurement
520 !
530       OUTPUT Testset;"FETCh:DAPOWER?"
540       ! Fetch the digital average power measurement results
550       ENTER Testset;Integrity,Avg_power_dbm
560 !
570       Avg_power_dbw=Avg_power_dbm-30
580       ! Convert dBm to dBW
590 !
600 !***Print Max Power Test Results***
610 !
620       CLEAR SCREEN
630       PRINT "Max Power Test Results:"
640       PRINT
650       PRINT "Integrity Indicator = ",Integrity
660       PRINT "Maximum Power (dBm) = ",Avg_power_dbm
670       PRINT "Maximum Power (dBW) = ",Avg_power_dbw
680       PRINT
690       PRINT "Maximum Output Power Test Complete"
700 !
710 !***Post test clean up***
720 !
730       OUTPUT Testset;"CALL:CLPCONTROL:REVERSE:MODE ACTIVE"
740       ! Return to active power control bits
750       OUTPUT Testset;"CALL:POW -55"
760       ! Set cell power back to initial level
770       ! Do this before reconfiguring other parms so signaling
780       OUTPUT Testset;"CALL:APAR:PROBE:IADJUST 0"
790       ! Set Access parameters for test
800       OUTPUT Testset;"CALL:APAR:PROBE:STEP:COUNT 5"
810       ! Set Access parameters for test
820       !OUTPUT Testset;"CALL:APAR:PROBE:SEQUENCE 1"
830       ! Set Access parameters for test (not necessary if commented
840       ! out command before test)
850       OUTPUT Testset;"CALL:APAR:PROBE:POWER:STEP 1"
860       ! Set Access paramters for test
870       OUTPUT Testset;"INIT:DAP:OFF"
880       ! Turn digital ave power off
890       DISP ""
900 !
910       END

Related Topics

Digital Average Power Measurement Description

Manual Operation: Measuring Digital Average Power

Digital Average Power Troubleshooting

4.3.4 Maximum RF Output Power